Contact sensor



FIG. 1 is a perspective view of a contact sensor showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown are included for the purpose of illustrating portions of the contact sensor that form no part of the claimed design. 

CLAIM The ornamental design for a contact sensor, as shown and described. 